Air intake protective grille for helicopter engine

Abstract

The application belongs to the technical field of helicopter anti-icing, and in particular relates to a helicopter engine air intake protection grille. Engine air intake protection grille, including longitudinal heating assembly (1), horizontal heating assembly (2) and power distribution control box (3). The distribution of longitudinal heating assembly (1) and horizontal heating assembly (2) includes bus bars and Heating elements connected to the bus bars at both ends; two sets of heating elements are arranged crosswise to form a curved grid structure; the power distribution control box (3) is configured as a device for controlling the opening or closing of the switch of the power supply according to the control command . The grid holes of the mesh structure of the present application can prevent large particles of foreign matter from being sucked into the engine, and can prevent the grid holes from being frozen and blocked, so as to ensure the safety of the engine working continuously for a long time in an icy environment. Combined with the use of the bypass air intake sand control device, it can solve the safety problems of taking into account sand control, foreign body prevention, bird strike resistance and long-term flight in icy environments.

Description

technical field [0001] The application belongs to the technical field of helicopter anti-icing, and in particular relates to a helicopter engine air intake protection grille. Background technique [0002] In order to prevent icing in the air, the engine inlet of the helicopter needs to be heated and anti-icing. In order to prevent large particles of foreign matter from entering the engine during flight, an air intake filter needs to be installed. . [0003] In the prior art, there is no helicopter engine protection device that takes into account sand prevention, foreign matter prevention, bird strike resistance and long-term flight in icy environments. Ordinary air intakes with anti-icing function cannot effectively prevent foreign objects from entering, and cannot prevent birds from entering. After the ordinary air intake filter and sand control device are installed, because there is no heating and anti-icing function, it is easy to freeze when flying in an icy environmen...

AI Technical Summary

Problems solved by technology

When flying in an icy environment for a long time, the icing of the existing ordinary air intake filter or sand control device will gradually block the intake air, causing excessive loss of engine power, and even causing the engine to stall

After the sand control device is set with side or forward air intake bypass, the problem of air intake blockage can be solved, but there are still problems with the entry of large particles of foreign matter and the inability to prevent the entry of birds.

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